Update prebuilts to go1.11 ab/4979655

Test: m -j blueprint_tools
Change-Id: Ia7faf31e862a3eb235f48abc03bdbde2f3d06881
diff --git a/doc/install-source.html b/doc/install-source.html
index 4ed9487..f6d9473 100644
--- a/doc/install-source.html
+++ b/doc/install-source.html
@@ -98,7 +98,7 @@
 
 <p>
 The compilers can target the DragonFly BSD, FreeBSD, Linux, NetBSD, OpenBSD,
-OS X (Darwin), Plan 9, Solaris and Windows operating systems.
+macOS (Darwin), Plan 9, Solaris and Windows operating systems.
 The full set of supported combinations is listed in the discussion of
 <a href="#environment">environment variables</a> below.
 </p>
@@ -197,7 +197,7 @@
 <p>
 If you do not have a working Git installation,
 follow the instructions on the
-<a href="http://git-scm.com/downloads">Git downloads</a> page.
+<a href="https://git-scm.com/downloads">Git downloads</a> page.
 </p>
 
 <h2 id="ccompiler">(Optional) Install a C compiler</h2>
@@ -307,7 +307,7 @@
 import "fmt"
 
 func main() {
-    fmt.Printf("hello, world\n")
+	fmt.Printf("hello, world\n")
 }
 </pre>
 
@@ -388,7 +388,7 @@
 
 <p>
 The usual community resources such as
-<code>#go-nuts</code> on the <a href="http://freenode.net/">Freenode</a> IRC server
+<code>#go-nuts</code> on the <a href="https://freenode.net/">Freenode</a> IRC server
 and the
 <a href="//groups.google.com/group/golang-nuts">Go Nuts</a>
 mailing list have active developers that can help you with problems
@@ -468,7 +468,7 @@
 
 <p>
 Choices for <code>$GOOS</code> are
-<code>darwin</code> (Mac OS X 10.8 and above and iOS), <code>dragonfly</code>, <code>freebsd</code>,
+<code>darwin</code> (macOS 10.10 and above and iOS), <code>dragonfly</code>, <code>freebsd</code>,
 <code>linux</code>, <code>netbsd</code>, <code>openbsd</code>,
 <code>plan9</code>, <code>solaris</code> and <code>windows</code>.
 Choices for <code>$GOARCH</code> are